TORONTO (Reuters) – A white van killed at least two people on a suburban Toronto sidewalk on Monday after jumping the curb and the driver was in custody, according to police and a Reuters witness.

Police in Canada's largest city initially said eight to 10 people had been injured but later said it was unclear exactly how many had been hurt or the extent of their injuries.

A Reuters witness said there were at least two bodies at the site of the incident.

It was not immediately clear if the incident was a deliberate act by the driver or a traffic mishap. It occurred at lunchtime on a sunny day and the sidewalks of the mixed commercial and residential area were full of pedestrians.

"Too early to confirm the number of pedestrians struck or their injuries," police said on Twitter.

Police were called just before 1:30 p.m. (1730 GMT) to the corner of Yonge Street and Finch Avenue in the north end of the city, where a van drove onto the sidewalk and hit multiple people, said Toronto Police spokeswoman Meaghan Gray.

Buildings and workplaces in the area were locked down, and a nearby subway station was closed and service suspended.

The incident happened about 30 kms (18 miles) from downtown, where the Group of Seven foreign ministers of industrialized nations, including Canada, the United States, Britain, France, Germany, Italy, and Japan were meeting on Monday. There was no noticeable change in security around the Intercontinental Hotel where the ministers gathered.

Canadian Prime Minister Justin Trudeau said officials were investigating.

"We're still gathering information and as soon as we can, we'll share more information with Canadians," Trudeau told reporters about an hour after news of the incident broke.

The United States and Europe have seen a string of deadly attacks in which vehicles were used to mow down pedestrians, including an Oct. 31 attack in New York that killed eight.